<script>
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export default {
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props: {
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isAutoWidth: Boolean,
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updateAll: Boolean
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},
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inject: ['elForm', 'elFormItem'],
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render() {
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const slots = this.$slots.default;
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if (!slots) return null;
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if (this.isAutoWidth) {
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const autoLabelWidth = this.elForm.autoLabelWidth;
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const style = {};
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if (autoLabelWidth && autoLabelWidth !== 'auto') {
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const marginLeft = parseInt(autoLabelWidth, 10) - this.computedWidth;
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if (marginLeft) {
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style.marginLeft = marginLeft + 'px';
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}
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}
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return (<div class="el-form-item__label-wrap" style={style}>
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{ slots }
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</div>);
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} else {
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return slots[0];
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}
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},
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methods: {
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getLabelWidth() {
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if (this.$el && this.$el.firstElementChild) {
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const computedWidth = window.getComputedStyle(this.$el.firstElementChild).width;
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return Math.ceil(parseFloat(computedWidth));
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} else {
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return 0;
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}
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},
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updateLabelWidth(action = 'update') {
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if (this.$slots.default && this.isAutoWidth && this.$el.firstElementChild) {
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if (action === 'update') {
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this.computedWidth = this.getLabelWidth();
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} else if (action === 'remove') {
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this.elForm.deregisterLabelWidth(this.computedWidth);
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}
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}
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}
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},
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watch: {
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computedWidth(val, oldVal) {
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if (this.updateAll) {
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this.elForm.registerLabelWidth(val, oldVal);
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this.elFormItem.updateComputedLabelWidth(val);
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}
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}
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},
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data() {
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return {
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computedWidth: 0
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};
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},
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mounted() {
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this.updateLabelWidth('update');
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},
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updated() {
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this.updateLabelWidth('update');
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},
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beforeDestroy() {
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this.updateLabelWidth('remove');
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}
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};
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</script>
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